bootloader of IAP(In-Application Programming) for ultra-low power stm8lxx series
Two modes for booting is provided: REMAP and OVERLAP
Any problems or questions, welcome contacting me via ccyinlu@gmail.com

• get the compile tool iccstm8, link tool ilinkstm8 and converter tool ielftool
  • install IAR IDE for stm8
  • add the tool path C:\Program Files (x86)\IAR Systems\Embedded Workbench 6.0 Evaluation\stm8\bin to the environment variable PATH ( if you change your installation settings, change the tool path accordingly)
• get the hardware st-link to flash the program
  • install the driver for st-link
• use STVP or IAR IDE to flash the program
• install python3 (you may be confronted with compatibility problems using python2)
  • install pySerial module

  cd ./python/pySerial/pyserial-master
  sudo python3 setup.py install

• you have two mode to choose: REMAP or OVERLAP(the mode will be explained further in reference)
  • REMAP mode

  file ./c/bootloader/bootloader.h
  // choose one of the option below
  #define   INTERRUPT_ADDRESS_REMAP
  //#define   INTERRUPT_ADDRESS_OVERLAPPED
  
  file ./python/stm8lxx_iap.py
  # choose one of the option below
  USING_INTERRUPT_ADDRESS_REMAP = True
  USING_INTERRUPT_ADDRESS_OVERLAPPED = False
  
  file ./c/app/lnkstm8l103k3.icf
  define region NearFuncCode = [from 0x8280 to 0x9FFF];
  define region FarFuncCode = [from 0x8280 to 0x9FFF];
  define region HugeFuncCode = [from 0x8280 to 0x9FFF];
  

  • OVERLAP mode

  file ./c/bootloader/bootloader.h
  // choose one of the option below
  //#define   INTERRUPT_ADDRESS_REMAP
  #define   INTERRUPT_ADDRESS_OVERLAPPED
  
  file ./python/stm8lxx_iap.py
  # choose one of the option below
  USING_INTERRUPT_ADDRESS_REMAP = False
  USING_INTERRUPT_ADDRESS_OVERLAPPED = True
  
  file ./c/app/lnkstm8l103k3.icf
  define region NearFuncCode = [from 0x8200 to 0x9FFF];
  define region FarFuncCode = [from 0x8200 to 0x9FFF];
  define region HugeFuncCode = [from 0x8200 to 0x9FFF];
  

• you can specify the address of the program storing the app reset interrupt address in OVERLAP mode (you should avoid the address both for the bootloader and app), using 0x827c as an example:

file ./c/bootloader/bootloader.c
#ifdef INTERRUPT_ADDRESS_OVERLAPPED
          asm("JP $827c");
#endif
#ifdef INTERRUPT_ADDRESS_REMAP
          asm("JP $8280");
#endif
file ./c/bootloader/bootloader.h
#define   FLASH_APP_MAIN        0x827c

run ./c/make-bootloader.bat  
you will find bootloader.bin and bootloader.hex under ./c/bootloader/output  
run ./c/make-app.bat
you will find test.bin under ./c/app/output

for you own app binary file, use the compile tool or IDE to get the binary file, replace the test.bin

• using STVP or IAR IDE to burn bootloader.bin to stm8lxx chip
• run the python script to flash app bin to stm8lxx chip
  • use /dev/ttyS2 as the example for UART (com* in windows system) and test.bin for app binary file

  cd ./python
  sudo python3 stm8lxx_iap.py /dev/ttyS2 ../c/app/output/test.bin
  

  • reset stm8lxx chip
• here is the example of the process:

ccyinlu@orangepipcplus:~/Git/stm8l-bootloader/python$ sudo python stm8l1xx_iap.py /dev/ttyS2 ../c/app/output/test.bin
serial com port: /dev/ttyS2
file name:       ../c/app/output/test.bin
file size:       351 bytes
BOOT_HEAD_OK received
RESET Vector address in the file:    0x820083b9
RESET Vector address in the chip:    0x8200819d
reset vector address modified successful
flash page 0 write successful
flash page 1 write successful
bootloader interrupt vector programmed successful
flash page 10 write successful
flash page 11 write successful
flash page 12 write successful
flash page 13 write successful
flash page 14 write successful
flash page 15 write successful
hello world

Want more information of customized bootloader and tips for this project?
Go to read the reference

Thanks for the work hairBoot of Zepan.